Welding-swage for chain-links.



No. 652.,|46. Fatemi lune I9, moo. H. sPuHL.

WELDING SWAGE FUR CHAIN LINKS. (Application led July 16, 1899.)

(No Model.)

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NrrEn dSTATES PATENT FFICE.

HEINRICH SPI'IL, OF ST. GALL, SWITZERLAND, ASSIGNOR TO THE IVIASCI-IINENFABRIK ST. GEORGEN BEI ST. GALLEN GOTTFR. V. SUSSKIND, OF ST. GEORGEN, SWITZERLAND.

WELDING-SWAG E FOR CHAIN-LINKS.

SPECIFICATION forming part of Letters Patent No. 652,146, dated J' une 19, 1900. Application filed .Tuly l5, 1899. Serial No. 723.962. (No model.)

To MZ whom, t may concern;

Be it known that I, HEINRICH SP HL, a citizen of the Confederation of Switzerland, residing at St. Gall, Switzerland, have invented a new and Improved VVelding-Swage for Chain- Links, of which the following is an exact specification.

The present invention relates to an improvement in welding-swages for chain-links, by means of which my chain-welding machine, forming the object of my Letters Patent No. 619,850,can be employed for welding the chainlinks at their curved parts, while in the aforecited application the links only could be weided at the sides. In the aforecited machine the swage is provided with a cam for the purpose of adjusting the ends of thelink before the weld-V ing. Further arrangements are made that the chain, being in welding heat, cannot come into contact with its swage, thus the premature cooling of the heated ends of the links being prevented.

In order to attain the purpose of welding the links at their curved parts, use of a swage of special form is made.

The object of my invention is clearly represented in the accompanying drawings, in Which i Figure l illustrates a front View of the upper swage. Fig. 2 is a section throughs of Fig. l. Fig. 3 is a section through the upper and lower swage during the welding process. Fig. 4 is a detail front View of thelowerswage. Fig. 5 is a section through the lower swage supporting a chain-link to be welded. Fig. 6 is a section through the middle portion of the upper swage. Fig. 7 is a back view of the upper swage. Fig. Sis a top View of the lower swage, with a chain-link. Fig. 9 is a horizontal section through y y of Fig. 3, showing the disposition of the chain. Fig. lO is a corresponding view of a modified construction of the lower swage. Fig. 1l illustrates a plate by means of which the upper swage is fixed to the hammer-head.

The upper swage o., Figs. l, 2, 3, 6, and 7,

is provided with a cam Z7, having a curved V surface b in form corresponding to the curve of the chain-links, (in the example represented being semicircular.) The surface has a board b2, tapered to the outside. A prismatic projection h3 engages into a groove provided within a plate e, fixed in the hammer-head. The upper swage a, is providedrwith a recess a2, the board of which, a3, corresponds to the form of the chain-link to be weldedthat is to say, semicircular at the point of welding- Whereas `the remaining portion is of a iiat shape, Fig. 7. The semicircular part of the board a3 forms a round swage o', and the flat portion insures that only the place of weld can be hit by the hammer.

The lower swage d, Figs. 4, 5, 8, and 9,. is provided with a recess di, corresponding in form and size to the section of the cam l) of the upper swage, Fig. 8. The lower swage has a semicircnlar swage c2, corresponding in form to the upper swage. Furthermore, the lower swage is provided with a bolt d', in form corresponding to the inner space of the chainlink c. This bolt d at its front side :is provided with a groove d2, taking up the last welded chain link. The bolt d is conical and takes up the link to be welded, and owing to its conical form prevents thelink from coming into contact with the swage before the blow is effected.

The welding of links is effected in the following manner: The U -shaped link after having received its shape (illustrated in Figs. 5 and 8) is laid into the groove cl2. The place of weld cornes to lie upon the round swage. When now the hammer-head, with the upper swage a, descends, the cam b enters the recess d3 of the lower swage, and owing to its semicircular surface b2 presses the ends to be welded of the link c against the bolt d, so that these ends come to lie exactly one above the other. The upper round swage c edects the blow upon the ends of the links, whereby the same are Welded and adopt the form of the round swages. The inner curved surface of the cam secures the right position 0f the ends to be welded and prevents the premature cooling of the saine. The upper swage a easily can be interchanged by means of the plate e.

Having thus fully described the nature of this invention, what I desire to secure by Letters Patent of the United States is- In a chain-Welding machine, the combina- IOO tion of an upper :md a lower sWa'ge, the first and from getting cooled, substantially as setl to being provided with a. curved part or cam oorforth. responding to the curve of the chain-links to In Witness whereof I have hereunto set my be welded, the second swage being provided hand in presence of two Witnesses.

5 With a recess of a form corresponding to the form of the cam and a stretcher adapted to HEINRICH SPUHL hold the chain-links with their` heated ends Witnesses: overtopping the same, thus preventing them JUAN BARTHOLET, from touching any other parts before the blow HANS KOLLER. 

